<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录成功</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f0f4f8;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
        }
        .card {
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            padding: 2rem;
            width: 100%;
            max-width: 400px;
            text-align: center;
        }
        h1 {
            color: #333;
            margin-bottom: 0.5rem;
        }
        p {
            color: #666;
            margin-bottom: 1.5rem;
        }
        .success-icon {
            color: #4caf50;
            font-size: 4rem;
            margin-bottom: 1rem;
        }
        button {
            background-color: #4a90e2;
            color: white;
            padding: 0.75rem 1.5rem;
            border: none;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        button:hover {
            background-color: #3a7bd5;
        }
    </style>
</head>
<body>
<div class="card">
    <div class="success-icon">✓</div>
    <h1>登录成功</h1>
    <p>欢迎回来!</p>
    <button onclick="window.location.href='index.html'">返回主页</button>
</div>
</body>
</html>